Previously, we developed a simple method to fabricate a composite film of a conducting polymer (PEDOT:PSS) and single-walled carbon nanotubes (SWCNTs) that exhibited high thermoelectric performance. In the present work, the carrier density of the composite film was controlled using an electrochemical method. The thermoelectric performances of the obtained composite films were analyzed in terms of their carrier densities. The electrical conductivities of the composite films were affected by the change in the carrier species of PEDOT:PSS, but overall the values were relatively high owing to the SWCNTs. The Seebeck effect showed a unique behavior reflecting the van Hove singularity in response to variations in the carrier density.

以前，我们开发了一种简单的方法来制造具有高热电性能的导电聚合物 (PEDOT:PSS) 和单壁碳纳米管 (SWCNT)的复合膜。在目前的工作中，使用电化学方法控制复合膜的载流子密度。根据载流子密度分析所得复合膜的热电性能。复合薄膜的电导率受 PEDOT:PSS 载体种类变化的影响，但由于 SWCNTs，总体上该值相对较高。塞贝克效应表现出一种独特的行为，反映了范霍夫奇点对载流子密度变化的响应。